"Going Galt" in the real world amounts to deliberately reducing production or moving it elsewhere. A short while ago, I saw an article about someplace on the east cost (New Jersey?) that hiked taxes on folks making "rich people money". They figured it would cover all of their budget shortfalls for the next year. Instead, they wound up in the hole by twice as much because the "rich folks" decided to move and/or find ways to earn less income.
It's not as extreme or dramatic as Atlas Shrugged, and it doesn't take a conspiracy to pull off... it happens when people seek their own best interests. I will readily agree that there are no magical force fields in our future, but the story does illustrate a truth -- people as a rule do not like being food for parasites.
Actually, moving to a more congenial location is not the same as "going Galt." Going Galt was explicitly intended as a strike to "stop the motor of the world."
If someone doesn't think that having 30,000 of disposable income (after taxes) is "worth it" over having, say "25,000" after taxes, that's their prerogative. But the deliberate attempt to bring down civilization--explicit in Atlas Shrugged and, IIRC, hastening that end is one of Hornadyl's express reasons for "going Galt"--is to what I object.